Update cheatsheets

tldr/linux/newrole

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# newrole
+
+> Run a new shell with a different SELinux role.
+> Allows users to switch to a different SELinux security context.
+> See also: `runcon`, `semanage-user`.
+> More information: <https://manned.org/newrole>.
+
+- Start a new shell with a specific SELinux role:
+
+`newrole {{[-r|--role]}} {{role_name}}`
+
+- Start a new shell with a specific SELinux type:
+
+`newrole {{[-t|--type]}} {{type_name}}`
+
+- Start a new shell with a specific SELinux level (format: `s0-s0:c0.c1023` where levels range from `s0` to `s15`, `-` indicates level range, categories start with `c`, `:` separates level from categories, `.` indicates category range):
+
+`newrole {{[-l|--level]}} {{s0-s0:c0.c1023}}`
+
+- Display the current SELinux context:
+
+`id {{[-Z|--context]}}`
+
+- Start a new shell with both role and type:
+
+`newrole {{[-r|--role]}} {{role_name}} {{[-t|--type]}} {{type_name}}`